const std::list<Block *> &get_blocks() const { return blocks; }
Block &get_block_by_track(const Track &) const;
const std::list<Train *> &get_trains() const { return trains; }
const std::list<Block *> &get_blocks() const { return blocks; }
Block &get_block_by_track(const Track &) const;
const std::list<Train *> &get_trains() const { return trains; }